安徽琅琊山落叶阔叶林结构及其土壤特性

 以琅琊山落叶阔叶林为研究对象,对样地林分进行每木检尺,并对林下更新状况及土壤特性进行调查分析。结果表明:4块样地共出现树种8种(胸径≥3.0 cm),分属7科9属,以槭树科和榆树科为主;群落垂直结构简单,灌木层和草本不甚明显。乔木层中的五角枫、榉树、化香3个树种居绝对优势地位,琅琊山落叶阔叶林的树种多样性较低。不同林分土壤理化特性表现为:呈中性至微酸性反应,EC值、有机质、速效P及速效K含量都较高,N含量中等,综合养分条件较好;土壤pH(H2O)值、速效N和全N是影响各调查林分林木生长及林下更新的主要因子。研究结果可为琅琊山森林的自然更新和可持续经营提供科学依据。

Stand structure and soil characteristics in a deciduous broadleaved forest in Langyashan Forest Park, Anhui

A typical deciduous broadleaved forest in Langyashan Forest Park was studied and every tree in sample was surveyed.Regeneration characteristics and soil properties were investigated.The results showed that a total of 8 tree species（diameter at breast height≥3.0cm） which belonged to 7 families and 9 genii were recorded within 4 sampling plots.Aceraceae and Ulmaceae were dominant families in this forest type.The vertical structure of the forest was simple without obvious shrub and herb layers.In the arbor layer,Acer mono,Zelkova schneideriana and Platycarya strobilacea were the dominant tree species with absolute dominance.Tree species diversity was relatively low in this deciduous broadleaved forest.The characteristics of soils under this forest demonstrated that the concentrations of organic matter,available P and K were relatively high with a high EC and weak acidity.However,the soil depth in sites was shallow with a high content of rock fragments,which could be the major control for the low tree species diversity.TN、pH（H2O） and available N are the mostly factors affecting on the growth of tree in different population structures.This results would provide a scientific base for Langyashan forest regeneration and sustainable forest management.